WO2012120592A1 - Cooling system for vehicle - Google Patents
Cooling system for vehicle Download PDFInfo
- Publication number
- WO2012120592A1 WO2012120592A1 PCT/JP2011/055070 JP2011055070W WO2012120592A1 WO 2012120592 A1 WO2012120592 A1 WO 2012120592A1 JP 2011055070 W JP2011055070 W JP 2011055070W WO 2012120592 A1 WO2012120592 A1 WO 2012120592A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid medium
- pump
- cooling system
- flow rate
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/14—Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/36—Temperature of vehicle components or parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/04—Pressure
- F01P2025/06—Pressure for determining flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2031/00—Fail safe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2031/00—Fail safe
- F01P2031/36—Failure of coolant pump
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a vehicle cooling system, and more particularly to a vehicle cooling system having a control device that identifies a defective portion of the cooling system.
- An example of a technique for determining a failure in a cooling system of a vehicle is an abnormality determination device described in Japanese Patent Laid-Open No. 2009-46077 (Patent Document 1).
- This abnormality determination device suppresses erroneous determination that determines that the electric water pump is abnormal although the driving state of the electric water pump is normal.
- the electronic control unit pumps the cooling water to the heater core provided in the water passage from the electric pump to the engine when the engine is stopped, and the cooling water temperature inside the heater core with respect to the cooling water temperature inside the engine. Is determined to be abnormal when the electric pump is in a driving state.
- the abnormality determination device disclosed in Japanese Patent Application Laid-Open No. 2009-46077 assumes a water pump abnormality as an abnormality in the cooling system. Even if an abnormality occurs in other parts, it is regarded as an abnormality of the water pump. It cannot be detected separately.
- the abnormality in the cooling system includes an abnormality in the control signal of the water pump, an abnormality occurring in the hardware of the water pump itself, an abnormality in the water passage, an abnormality in the heat dissipation system, and the like. For this reason, it took time and effort to specify the part of the failure at the time of repair.
- An object of the present invention is to provide a vehicle cooling system that can detect and detect abnormalities in the cooling system in more detail.
- the present invention provides a vehicle cooling system, a flow path for circulating a liquid medium for cooling a vehicle drive device, a flow rate detection unit for detecting a flow rate of the liquid medium flowing through the flow path, and a liquid medium
- a temperature sensor for detecting the temperature, a pump for circulating the liquid medium provided on the flow path, a rotation speed sensor for detecting the rotation speed of the pump, and a control device for controlling the drive of the pump are provided.
- the control device identifies a defective portion of the cooling system according to the flow rate of the liquid medium, the temperature of the liquid medium, and the rotational speed of the pump.
- the control device temporarily increases the rotation speed of the pump, and then the flow rate is normal. If the value does not recover, it is determined that the defective part is a flow path.
- the control device identifies that the defective part is the pump. To do.
- the cooling system further includes a radiator provided on the flow path and a fan for blowing air to the radiator.
- the control device detects heat generation or heat radiation abnormality based on the operating state of the fan and the inverter temperature.
- the abnormality of the cooling system can be distinguished and detected in more detail, so that the locations to be confirmed at the time of repair are limited and the work efficiency is improved.
- FIG. 1 is a circuit diagram showing a configuration of a vehicle 100 equipped with a vehicle cooling system. It is the figure which showed the relationship between the water flow resistance of a cooling system, and flow volume. It is the figure which showed the abnormality considered based on water temperature, the rotational speed of a pump, and a flow volume, and its verification method. It is a flowchart for demonstrating the diagnostic process performed with the control apparatus 30 of FIG.
- FIG. 1 is a circuit diagram showing a configuration of a vehicle 100 equipped with a vehicle cooling system.
- vehicle 100 includes a battery MB that is a power storage device, a voltage sensor 10, a power control unit (PCU) 40, a motor generator MG, and a control device 30.
- PCU 40 includes a voltage converter 12, smoothing capacitors C 1, CH, a voltage sensor 13, and an inverter 14.
- Vehicle 100 further includes a positive electrode bus PL2 that supplies power to inverter 14 that drives motor generator MG.
- the smoothing capacitor C1 is connected between the positive electrode bus PL1 and the negative electrode bus SL2.
- the voltage converter 12 boosts the voltage across the terminals of the smoothing capacitor C1.
- Smoothing capacitor CH smoothes the voltage boosted by voltage converter 12.
- the voltage sensor 13 detects the voltage VH between the terminals of the smoothing capacitor CH and outputs it to the control device 30.
- Vehicle 100 further includes system main relay SMRB connected between the positive electrode of battery MB and positive electrode bus PL1, and system main relay SMRG connected between the negative electrode of battery MB (negative electrode bus SL1) and node N2. Including.
- the system main relays SMRB and SMRG are controlled to be in a conductive / non-conductive state in accordance with a control signal SE given from the control device 30.
- the voltage sensor 10 measures the voltage VB between the terminals of the battery MB.
- a current sensor for detecting a current IB flowing through the battery MB is provided.
- the battery MB for example, a secondary battery such as a lead storage battery, a nickel metal hydride battery, or a lithium ion battery, or a large capacity capacitor such as an electric double layer capacitor can be used.
- the negative electrode bus SL2 extends through the voltage converter 12 to the inverter 14 side.
- the voltage converter 12 is a voltage converter that is provided between the battery MB and the positive electrode bus PL2 and performs voltage conversion. Voltage converter 12 is connected in parallel to reactor L1 whose one end is connected to positive electrode bus PL1, IGBT elements Q1, Q2 connected in series between positive electrode bus PL2 and negative electrode bus SL2, and IGBT elements Q1, Q2. And diodes D1 and D2 connected to each other.
- reactor L1 The other end of reactor L1 is connected to the emitter of IGBT element Q1 and the collector of IGBT element Q2.
- the cathode of diode D1 is connected to the collector of IGBT element Q1, and the anode of diode D1 is connected to the emitter of IGBT element Q1.
- the cathode of diode D2 is connected to the collector of IGBT element Q2, and the anode of diode D2 is connected to the emitter of IGBT element Q2.
- the inverter 14 is connected to the positive electrode bus PL2 and the negative electrode bus SL2. Inverter 14 converts the DC voltage output from voltage converter 12 into a three-phase AC voltage and outputs the same to motor generator MG driving wheel 2. Inverter 14 returns the electric power generated in motor generator MG to voltage converter 12 along with regenerative braking. At this time, the voltage converter 12 is controlled by the control device 30 so as to operate as a step-down circuit.
- the inverter 14 includes a U-phase arm 15, a V-phase arm 16, and a W-phase arm 17.
- U-phase arm 15, V-phase arm 16, and W-phase arm 17 are connected in parallel between positive electrode bus PL2 and negative electrode bus SL2.
- U-phase arm 15 includes IGBT elements Q3 and Q4 connected in series between positive electrode bus PL2 and negative electrode bus SL2, and diodes D3 and D4 connected in parallel with IGBT elements Q3 and Q4, respectively.
- the cathode of diode D3 is connected to the collector of IGBT element Q3, and the anode of diode D3 is connected to the emitter of IGBT element Q3.
- the cathode of diode D4 is connected to the collector of IGBT element Q4, and the anode of diode D4 is connected to the emitter of IGBT element Q4.
- V-phase arm 16 includes IGBT elements Q5 and Q6 connected in series between positive electrode bus PL2 and negative electrode bus SL2, and diodes D5 and D6 connected in parallel with IGBT elements Q5 and Q6, respectively.
- the cathode of diode D5 is connected to the collector of IGBT element Q5, and the anode of diode D5 is connected to the emitter of IGBT element Q5.
- the cathode of diode D6 is connected to the collector of IGBT element Q6, and the anode of diode D6 is connected to the emitter of IGBT element Q6.
- W-phase arm 17 includes IGBT elements Q7 and Q8 connected in series between positive electrode bus PL2 and negative electrode bus SL2, and diodes D7 and D8 connected in parallel with IGBT elements Q7 and Q8, respectively.
- the cathode of diode D7 is connected to the collector of IGBT element Q7, and the anode of diode D7 is connected to the emitter of IGBT element Q7.
- the cathode of diode D8 is connected to the collector of IGBT element Q8, and the anode of diode D8 is connected to the emitter of IGBT element Q8.
- the motor generator MG is a three-phase permanent magnet synchronous motor, and one end of each of the three stator coils of the U, V, and W phases is connected to a neutral point.
- the other end of the U-phase coil is connected to a line drawn from the connection node of IGBT elements Q3 and Q4.
- the other end of the V-phase coil is connected to a line drawn from the connection node of IGBT elements Q5 and Q6.
- the other end of the W-phase coil is connected to a line drawn from the connection node of IGBT elements Q7 and Q8.
- Current sensor 24 detects the current flowing through motor generator MG as motor current value MCRT and outputs motor current value MCRT to control device 30.
- Control device 30 receives each torque command value and rotation speed of motor generator MG, each value of current IB and voltages VB and VH, motor current value MCRT, and start signal IGON. Control device 30 outputs a control signal PWU for instructing voltage converter 12, a control signal PWD for instructing step-down, and a shutdown signal for instructing prohibition of operation.
- control device 30 generates a control signal PWMI for instructing inverter 14 to convert a DC voltage output from voltage converter 12 into an AC voltage for driving motor generator MG, and motor generator MG for power generation.
- a control signal PWMC for performing a regeneration instruction for converting the AC voltage thus converted into a DC voltage and returning it to the voltage converter 12 side is output.
- vehicle 100 includes a radiator 102, a reservoir tank 106, and a water pump 104 as a cooling system for cooling PCU 40 and motor generator MG.
- the radiator 102, the PCU 40, the reservoir tank 106, the water pump 104, and the motor generator MG are annularly connected in series via a water passage.
- a flow rate sensor 114 is provided in the water passage, and the flow rate FR is transmitted to the control device 30. Instead of the flow rate sensor 114, another method for estimating the flow rate of the cooling water may be used.
- the water pump 104 is a pump for circulating cooling water such as antifreeze and circulates cooling water in the direction of the arrow shown in the figure.
- the radiator 102 receives the cooling water after cooling the voltage converter 12 and the inverter 14 inside the PCU 40 from the water passage, and cools the received cooling water using the radiator fan 103.
- a temperature sensor 108 for measuring the cooling water temperature is provided in the vicinity of the cooling water inlet of the PCU 40.
- the cooling water temperature TW is transmitted from the temperature sensor 108 to the control device 30.
- a temperature sensor 110 that detects the temperature TC of the voltage converter 12 and a temperature sensor 112 that detects the temperature TI of the inverter 14 are provided inside the PCU 40.
- a temperature detection element or the like built in the intelligent power module is used as the temperature sensors 110 and 112, a temperature detection element or the like built in the intelligent power module is used.
- Control device 30 generates signal SP for driving water pump 104 based on temperature TC from temperature sensor 110 and temperature TI from temperature sensor 112, and outputs the generated signal SP to water pump 104. To do.
- a flow rate sensor 114 for detecting the flow rate of cooling water that has not been detected conventionally is provided.
- detecting the flow rate it is possible to specify a more detailed failure location as will be described with reference to FIG. 2 and subsequent drawings regarding failures that could conventionally only be determined as a cooling system abnormality. Even if the flow sensor 114 is not provided, the same effect can be obtained by estimating the flow rate by another method.
- FIG. 2 is a diagram showing the relationship between the water flow resistance of the cooling system and the flow rate.
- the water flow resistance (kPa) of the cooling system is shown on the vertical axis
- the flow rate (L / min) of the refrigerant such as cooling water is shown on the horizontal axis.
- the flow resistance (kPa) changes along a curve passing through the points P4 and P5 when the flow rate increases or decreases.
- the water passage resistance increases.
- the water flow resistance (kPa) changes along a curve passing through the points P1, P2, and P3.
- the control device 30 in FIG. 1 changes the control signal SP for the water pump 104 to increase the rotation speed to N3. If the foreign object remains sandwiched, the operating point moves to point P3 as indicated by arrow A2. Here, when the foreign matter is removed due to the increase of the water flow resistance, the flow rate is recovered and the operating point moves to the point P4 as indicated by the arrow A3. If the flow rate sensor can detect that the flow rate has recovered, the control device changes the control signal SP to the water pump 104 and returns the rotation speed to N1.
- FIG. 3 is a diagram showing a possible abnormality based on the water temperature, the rotational speed of the pump, and the flow rate, and a verification method thereof.
- the control device 30 temporarily changes the rotation of the water pump 104 and observes the flow rate change. And if the change of a flow rate is observed from the operating point P1 of FIG. 2 and an operating point moves along the line of the points P2 to P3, the control apparatus 30 will judge that water flow resistance has deteriorated. . In this case, the control device 30 attempts to improve the state in which the foreign matter is caught in the water passage and cannot move by increasing the rotation of the water pump 104 and moving the operating point to the point P3 side. When the foreign object moves and the flow rate returns to the original state, the control device 30 returns the rotational speed to the original state. If the flow rate does not return to the original state, the control device 30 determines a diagnosis (diagnosis) that the piping system is abnormal.
- diagnosis diagnosis
- the control device 30 observes the current of the water pump 104 and the temperature of the water pump 104, and determines that the abnormality is in the pump itself if abnormalities such as abnormal heat generation or overcurrent are recognized. If there is no abnormality in the current or temperature, the control device 30 determines that there is an abnormality in another cooling system.
- FIG. 3 shows a case in which the control device 30 includes a plurality of ECUs. In this case, the control device 30 performs an abnormality determination of the cooling system to the ECU that controls the radiator fan by communication between the ECUs. A command for changing the rotation speed of the fan is issued, or an ECU for determining abnormality of the cooling system is obtained from a motor ECU that directly controls the inverter and the converter.
- FIG. 4 is a flowchart for explaining the diagnosis process executed by the control device 30 of FIG. The processing of this flowchart is called from the main routine and executed at regular time intervals or whenever a predetermined condition is satisfied.
- control device 30 reads water temperature TW from temperature sensor 108, reads rotation speed Np of water pump 104 from rotation sensor 105, The flow rate FR is read from the sensor 114.
- step S2 the control device 30 determines whether or not the condition that the water temperature TW is normal, the rotation speed Np is normal, and the flow rate FR is small is satisfied.
- “Normal” indicates that a numerical value is included between a predetermined upper limit value and a lower limit value, for example. Also, “less” means that the numerical value is smaller than the lower limit value of the normal predetermined range.
- step S2 If the condition of step S2 is satisfied, the process proceeds from step S2 to step S3.
- step S3 the control device 30 changes the control signal SP so as to temporarily reduce the rotational speed Np of the water pump 104.
- step S4 if the flow rate FR acquired from the flow rate sensor 114 does not decrease so as to cope with the decrease in rotational speed, the process proceeds to step S14. On the other hand, in step S4, when the flow rate FR acquired from the flow sensor 114 decreases to correspond to the decrease in rotation speed, the process proceeds to step S5.
- step S5 it is considered that the operating point in FIG. 2 has moved from point P1 to point P2.
- the failure is estimated to be a piping system abnormality (for example, the piping is clogged with foreign matter and the cross-sectional area is reduced).
- the rotational speed Np of the water pump 104 is temporarily increased to increase the flow rate, and the piping system abnormality (for example, foreign matter is clogged) is restored to the original state. Try that.
- step S6 the control device 30 determines whether or not the flow rate FR has recovered to a normal state. This can be done by checking whether the operating point is point P3 (abnormal) or point P4 (normal) in FIG. Since the rotational speed Np of the water pump 104 and the flow rate FR have a relationship indicated by a curve passing through the points P4 to P5 when normal, it is easy to determine a normal range of the flow rate FR with respect to the rotational speed Np.
- step S6 when the flow rate is restored to the normal flow rate, it is considered that the piping system abnormality has become normal. Therefore, the process merges with the case of “NO” in step S2, and the process proceeds to step S8. move on. On the other hand, if the flow rate does not recover in step S6, the process proceeds to step S7, and the diagnosis of the piping system abnormality is confirmed. The diagnosis result is notified to the driver on the spot, stored in a nonvolatile memory or the like, and later read out at a repair shop for analysis.
- step S8 the control device 30 determines whether or not the condition that the water temperature TW is normal, the rotational speed Np is low, and the flow rate FR is small is satisfied.
- “Normal” indicates that a numerical value is included between a predetermined upper limit value and a lower limit value, for example. Low and low indicate that the numerical value is smaller than the lower limit value of the normal predetermined range.
- step S8 If the condition of step S8 is satisfied, the process proceeds from step S8 to step S9. If the condition is not satisfied, the process proceeds to step S11.
- step S9 it is determined whether or not the current value abnormality of the water pump 104 or the internal temperature abnormality of the water pump 104 has occurred.
- An abnormality in the current value of the water pump 104 can be detected by providing a current sensor in the power supply line of the water pump 104. Further, the internal temperature of the water pump 104 can be detected by attaching a temperature sensor in or near the water pump 104.
- step S9 If neither the current value abnormality of the water pump 104 nor the internal temperature abnormality of the water pump 104 has occurred in step S9, the process proceeds to step S14. If the current value abnormality of the water pump 104 or the internal temperature abnormality of the water pump 104 has occurred in step S9, the process proceeds to step S10, and the diagnosis of the performance abnormality of the water pump 104 is confirmed. The diagnosis result is notified to the driver on the spot, stored in a nonvolatile memory or the like, and later read out at a repair shop for analysis.
- step S11 the control device 30 determines whether the condition that the water temperature TW is abnormal (high), the rotation speed Np is normal, and the flow rate FR is normal is satisfied.
- “Normal” indicates that a numerical value is included between a predetermined upper limit value and a lower limit value, for example. Further, “high” indicates that the numerical value is larger than the upper limit value of the normal predetermined range.
- step S11 If the condition of step S11 is satisfied, the process proceeds from step S11 to step S12. If the condition is not satisfied, the process proceeds to step S15. In step S15, since none of the conditions are met, a failure is not diagnosed and control is returned to the main routine.
- step S12 it is determined whether an operation abnormality of the radiator fan 103 or a heat generation abnormality of the inverter 14 has occurred.
- Abnormal operation of the radiator fan 103 can be determined by comparing the command value from the control device 30 with the rotational speed detected by the radiator fan 103.
- Abnormal heat generation of the inverter 14 can be determined by whether or not the temperature TI from the temperature sensor 112 incorporated in the inverter 14 exceeds a predetermined threshold value.
- step S12 when neither the radiator fan 103 malfunction nor the inverter 14 heat generation abnormality has occurred, the process proceeds to step S14. If any of the abnormal operation of the radiator fan 103 and the abnormal heat generation of the inverter 14 has occurred in step S12, the process proceeds to step S13, and the diagnosis of the heat dissipation abnormality or the heat generation abnormality is confirmed. The diagnosis result is notified to the driver on the spot, stored in a nonvolatile memory or the like, and later read out at a repair shop for analysis.
- step S14 a diagnosis of another abnormality of the cooling system (abnormalities other than those of steps S7, S10, and S13 among abnormality of the cooling system) is confirmed and notified to the driver on the spot. It is stored in a non-volatile memory or the like and later read out at a repair shop for analysis.
- the defective part of the cooling system is subdivided and specified by combining a new parameter such as the cooling water flow rate with the existing parameters such as the pump rotation speed and the cooling water temperature. be able to.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
この発明は、車両の冷却システムに関し、特に冷却システムの不具合部位を特定する制御装置を有する車両の冷却システムに関する。 The present invention relates to a vehicle cooling system, and more particularly to a vehicle cooling system having a control device that identifies a defective portion of the cooling system.
車両の冷却系の故障を判定する技術の例として、特開2009-46077号公報(特許文献1)に記載される異常判定装置が挙げられる。この異常判定装置は、電動式ウォータポンプの駆動状態が正常であるにもかかわらず異常と判定してしまう誤判定を抑制する。 An example of a technique for determining a failure in a cooling system of a vehicle is an abnormality determination device described in Japanese Patent Laid-Open No. 2009-46077 (Patent Document 1). This abnormality determination device suppresses erroneous determination that determines that the electric water pump is abnormal although the driving state of the electric water pump is normal.
具体的には、電子制御装置は、エンジンの停止時に電動式ポンプからエンジンへの通水路に設けられたヒータコアに冷却水を圧送し、エンジン内部の冷却水温度に対してヒータコア内部の冷却水温度が所定値以上低いときに電動式ポンプの駆動状態が異常である旨判定する。 Specifically, the electronic control unit pumps the cooling water to the heater core provided in the water passage from the electric pump to the engine when the engine is stopped, and the cooling water temperature inside the heater core with respect to the cooling water temperature inside the engine. Is determined to be abnormal when the electric pump is in a driving state.
特開2009-46077号公報に開示された異常判定装置は、冷却系の異常としてウォータポンプの異常を想定しており、他の部分に異常が発生していてもそれをウォータポンプの異常と区別して検出できない。たとえば、冷却系の異常としては、ウォータポンプの制御信号の異常、ウォータポンプ自体のハードウエアに発生した異常、通水路の異常、放熱系の異常等がある。このため、修理の際などに故障の部位の特定のために手間がかかっていた。 The abnormality determination device disclosed in Japanese Patent Application Laid-Open No. 2009-46077 assumes a water pump abnormality as an abnormality in the cooling system. Even if an abnormality occurs in other parts, it is regarded as an abnormality of the water pump. It cannot be detected separately. For example, the abnormality in the cooling system includes an abnormality in the control signal of the water pump, an abnormality occurring in the hardware of the water pump itself, an abnormality in the water passage, an abnormality in the heat dissipation system, and the like. For this reason, it took time and effort to specify the part of the failure at the time of repair.
この発明の目的は、冷却系の異常をより詳細に区別して検出できる車両の冷却システムを提供することである。 An object of the present invention is to provide a vehicle cooling system that can detect and detect abnormalities in the cooling system in more detail.
この発明は、要約すると、車両の冷却システムであって、車両の駆動装置を冷却する液媒体を循環させる流路と、流路を流れる液媒体の流量を検出する流量検出部と、液媒体の温度を検出する温度センサと、流路上に設けられた液媒体を循環させるためのポンプと、ポンプの回転速度を検出する回転速度センサと、ポンプの駆動を制御する制御装置とを備える。制御装置は、液媒体の流量と、液媒体の温度と、ポンプの回転速度とに応じて、冷却システムの不具合部位を特定する。 In summary, the present invention provides a vehicle cooling system, a flow path for circulating a liquid medium for cooling a vehicle drive device, a flow rate detection unit for detecting a flow rate of the liquid medium flowing through the flow path, and a liquid medium A temperature sensor for detecting the temperature, a pump for circulating the liquid medium provided on the flow path, a rotation speed sensor for detecting the rotation speed of the pump, and a control device for controlling the drive of the pump are provided. The control device identifies a defective portion of the cooling system according to the flow rate of the liquid medium, the temperature of the liquid medium, and the rotational speed of the pump.
好ましくは、制御装置は、液媒体の温度およびポンプの回転速度が正常であり、液媒体の流量が正常値よりも少ない場合には、ポンプの回転速度を一時的に増加させ、その後流量が正常値に回復しなければ不具合部位が流路であると特定する。 Preferably, when the temperature of the liquid medium and the rotation speed of the pump are normal and the flow rate of the liquid medium is less than a normal value, the control device temporarily increases the rotation speed of the pump, and then the flow rate is normal. If the value does not recover, it is determined that the defective part is a flow path.
好ましくは、制御装置は、液媒体の温度が正常であり、ポンプの回転速度が正常値よりも低く、かつ液媒体の流量が正常値よりも少ない場合には、不具合部位がポンプであると特定する。 Preferably, when the temperature of the liquid medium is normal, the rotation speed of the pump is lower than the normal value, and the flow rate of the liquid medium is lower than the normal value, the control device identifies that the defective part is the pump. To do.
好ましくは、冷却システムは、流路上に設けられるラジエータと、ラジエータに送風するためのファンとをさらに備える。制御装置は、液媒体の温度が異常であり、ポンプの回転速度および液媒体の流量が正常である場合には、ファンの作動状態とインバータ温度に基づいて発熱または放熱異常を検出する。 Preferably, the cooling system further includes a radiator provided on the flow path and a fan for blowing air to the radiator. When the temperature of the liquid medium is abnormal and the rotation speed of the pump and the flow rate of the liquid medium are normal, the control device detects heat generation or heat radiation abnormality based on the operating state of the fan and the inverter temperature.
本発明によれば、冷却系の異常をより詳細に区別して検出できるので、修理時に確認すべき箇所が限定され作業効率が改善される。 According to the present invention, the abnormality of the cooling system can be distinguished and detected in more detail, so that the locations to be confirmed at the time of repair are limited and the work efficiency is improved.
以下、本発明の実施の形態について図面を参照しながら詳細に説明する。なお、図中同一または相当部分には同一符号を付してその説明は繰返さない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.
図1は、車両の冷却システムが搭載された車両100の構成を示す回路図である。
[駆動系の説明]
図1を参照して、車両100は、蓄電装置であるバッテリMBと、電圧センサ10と、パワーコントロールユニット(PCU)40と、モータジェネレータMGと、制御装置30とを含む。PCU40は、電圧コンバータ12と、平滑用コンデンサC1,CHと、電圧センサ13と、インバータ14とを含む。車両100は、モータジェネレータMGを駆動するインバータ14に給電を行なう正極母線PL2をさらに含む。
FIG. 1 is a circuit diagram showing a configuration of a
[Description of drive system]
Referring to FIG. 1,
平滑用コンデンサC1は、正極母線PL1と負極母線SL2との間に接続される。電圧コンバータ12は、平滑用コンデンサC1の端子間電圧を昇圧する。平滑用コンデンサCHは、電圧コンバータ12によって昇圧された電圧を平滑化する。電圧センサ13は、平滑用コンデンサCHの端子間の電圧VHを検知して制御装置30に出力する。
The smoothing capacitor C1 is connected between the positive electrode bus PL1 and the negative electrode bus SL2. The
車両100は、さらに、バッテリMBの正極と正極母線PL1との間に接続されるシステムメインリレーSMRBと、バッテリMBの負極(負極母線SL1)とノードN2との間に接続されるシステムメインリレーSMRGとを含む。
システムメインリレーSMRB,SMRGは、制御装置30から与えられる制御信号SEに応じて導通/非導通状態が制御される。電圧センサ10は、バッテリMBの端子間の電圧VBを測定する。図示しないが、電圧センサ10とともにバッテリMBの充電状態を監視するために、バッテリMBに流れる電流IBを検出する電流センサが設けられている。
The system main relays SMRB and SMRG are controlled to be in a conductive / non-conductive state in accordance with a control signal SE given from the
バッテリMBとしては、たとえば、鉛蓄電池、ニッケル水素電池、リチウムイオン電池等の二次電池や、電気二重層コンデンサ等の大容量キャパシタなどを用いることができる。負極母線SL2は、電圧コンバータ12の中を通ってインバータ14側に延びている。
As the battery MB, for example, a secondary battery such as a lead storage battery, a nickel metal hydride battery, or a lithium ion battery, or a large capacity capacitor such as an electric double layer capacitor can be used. The negative electrode bus SL2 extends through the
電圧コンバータ12は、バッテリMBと正極母線PL2との間に設けられ、電圧変換を行なう電圧変換器である。電圧コンバータ12は、一方端が正極母線PL1に接続されるリアクトルL1と、正極母線PL2と負極母線SL2との間に直列に接続されるIGBT素子Q1,Q2と、IGBT素子Q1,Q2にそれぞれ並列に接続されるダイオードD1,D2とを含む。
The
リアクトルL1の他方端はIGBT素子Q1のエミッタおよびIGBT素子Q2のコレクタに接続される。ダイオードD1のカソードはIGBT素子Q1のコレクタと接続され、ダイオードD1のアノードはIGBT素子Q1のエミッタと接続される。ダイオードD2のカソードはIGBT素子Q2のコレクタと接続され、ダイオードD2のアノードはIGBT素子Q2のエミッタと接続される。 The other end of reactor L1 is connected to the emitter of IGBT element Q1 and the collector of IGBT element Q2. The cathode of diode D1 is connected to the collector of IGBT element Q1, and the anode of diode D1 is connected to the emitter of IGBT element Q1. The cathode of diode D2 is connected to the collector of IGBT element Q2, and the anode of diode D2 is connected to the emitter of IGBT element Q2.
インバータ14は、正極母線PL2と負極母線SL2に接続されている。インバータ14は車輪2を駆動するモータジェネレータMGに対して電圧コンバータ12の出力する直流電圧を三相交流電圧に変換して出力する。またインバータ14は、回生制動に伴い、モータジェネレータMGにおいて発電された電力を電圧コンバータ12に戻す。このとき電圧コンバータ12は、降圧回路として動作するように制御装置30によって制御される。
The
インバータ14は、U相アーム15と、V相アーム16と、W相アーム17とを含む。U相アーム15,V相アーム16,およびW相アーム17は、正極母線PL2と負極母線SL2との間に並列に接続される。
The
U相アーム15は、正極母線PL2と負極母線SL2との間に直列接続されたIGBT素子Q3,Q4と、IGBT素子Q3,Q4とそれぞれ並列に接続されるダイオードD3,D4とを含む。ダイオードD3のカソードはIGBT素子Q3のコレクタと接続され、ダイオードD3のアノードはIGBT素子Q3のエミッタと接続される。ダイオードD4のカソードはIGBT素子Q4のコレクタと接続され、ダイオードD4のアノードはIGBT素子Q4のエミッタと接続される。
V相アーム16は、正極母線PL2と負極母線SL2との間に直列接続されたIGBT素子Q5,Q6と、IGBT素子Q5,Q6とそれぞれ並列に接続されるダイオードD5,D6とを含む。ダイオードD5のカソードはIGBT素子Q5のコレクタと接続され、ダイオードD5のアノードはIGBT素子Q5のエミッタと接続される。ダイオードD6のカソードはIGBT素子Q6のコレクタと接続され、ダイオードD6のアノードはIGBT素子Q6のエミッタと接続される。
V-
W相アーム17は、正極母線PL2と負極母線SL2との間に直列接続されたIGBT素子Q7,Q8と、IGBT素子Q7,Q8とそれぞれ並列に接続されるダイオードD7,D8とを含む。ダイオードD7のカソードはIGBT素子Q7のコレクタと接続され、ダイオードD7のアノードはIGBT素子Q7のエミッタと接続される。ダイオードD8のカソードはIGBT素子Q8のコレクタと接続され、ダイオードD8のアノードはIGBT素子Q8のエミッタと接続される。
W-
モータジェネレータMGは、三相の永久磁石同期モータであり、U,V,W相の3つのステータコイルは各々一方端が中性点に共に接続されている。そして、U相コイルの他方端がIGBT素子Q3,Q4の接続ノードから引出されたラインに接続される。またV相コイルの他方端がIGBT素子Q5,Q6の接続ノードから引出されたラインに接続される。またW相コイルの他方端がIGBT素子Q7,Q8の接続ノードから引出されたラインに接続される。 The motor generator MG is a three-phase permanent magnet synchronous motor, and one end of each of the three stator coils of the U, V, and W phases is connected to a neutral point. The other end of the U-phase coil is connected to a line drawn from the connection node of IGBT elements Q3 and Q4. The other end of the V-phase coil is connected to a line drawn from the connection node of IGBT elements Q5 and Q6. The other end of the W-phase coil is connected to a line drawn from the connection node of IGBT elements Q7 and Q8.
電流センサ24は、モータジェネレータMGに流れる電流をモータ電流値MCRTとして検出し、モータ電流値MCRTを制御装置30へ出力する。
制御装置30は、モータジェネレータMGの各トルク指令値および回転速度と、電流IBおよび電圧VB,VHの各値と、モータ電流値MCRTと、起動信号IGONとを受ける。そして制御装置30は、電圧コンバータ12に対して昇圧指示を行なう制御信号PWU,降圧指示を行なう制御信号PWDおよび動作禁止を指示するシャットダウン信号を出力する。
さらに、制御装置30は、インバータ14に対して電圧コンバータ12の出力である直流電圧を、モータジェネレータMGを駆動するための交流電圧に変換する駆動指示を行なう制御信号PWMIと、モータジェネレータMGで発電された交流電圧を直流電圧に変換して電圧コンバータ12側に戻す回生指示を行なう制御信号PWMCとを出力する。
Further,
[冷却系の説明]
再び図1を参照して、車両100は、PCU40およびモータジェネレータMGを冷却する冷却系として、ラジエータ102と、リザーバータンク106と、ウォータポンプ104とを含む。
[Description of cooling system]
Referring again to FIG. 1,
ラジエータ102とPCU40とリザーバータンク106とウォータポンプ104とモータジェネレータMGとは、通水路によって直列に環状に接続されている。通水路には流量センサ114が設けられており、流量FRが制御装置30に送信される。なお、流量センサ114に代えて冷却水の流量を推定する他の方法を用いても良い。
The
[規則91に基づく訂正 21.03.2012]
ウォータポンプ104は、不凍液などの冷却水を循環させるためのポンプであって、図示される矢印の方向に冷却水を循環させる。ラジエータ102は、PCU40内部の電圧コンバータ12およびインバータ14を冷却した後の冷却水を通水路から受け、その受けた冷却水をラジエータファン103を用いて冷却する。
[Correction 21.03.2012 under Rule 91]
The
PCU40の冷却水入り口付近には、冷却水温を測定する温度センサ108が設けられている。温度センサ108からは冷却水温TWが制御装置30に送信される。また、PCU40の内部には、電圧コンバータ12の温度TCを検出する温度センサ110とインバータ14の温度TIを検出する温度センサ112とが設けられている。温度センサ110,112としては、インテリジェントパワーモジュールに内蔵されている温度検出素子等が用いられる。
In the vicinity of the cooling water inlet of the
制御装置30は、温度センサ110からの温度TCと温度センサ112からの温度TIとに基づいて、ウォータポンプ104を駆動するための信号SPを生成し、その生成した信号SPをウォータポンプ104へ出力する。
図1に示した構成では、従来検出されていなかった冷却水の流量を検出する流量センサ114を設けている。流量を検出することにより、従来は単に冷却系異常としか判別できなかった故障について、図2以降に説明するように、より細分化された故障箇所の特定が可能となる。なお流量センサ114を設けなくても、他の方法によって流量を推定することによっても同様な効果を得ることができる。
In the configuration shown in FIG. 1, a
図2は、冷却系の通水抵抗と流量との関係を示した図である。
図2を参照して、冷却系の通水抵抗(kPa)が縦軸に示され、冷却水などの冷媒の流量(L/min)が横軸に示されている。冷却系の通水抵抗と流量とが正常な関係であれば、流量が増減すると点P4と点P5を通る曲線に沿って通水抵抗(kPa)は変化する。しかし、冷却系の通水路などに異物(錆びなど)による詰まりが発生すると、通水抵抗は増加する。この場合、流量が増減すると、点P1,点P2および点P3を通る曲線に沿って通水抵抗(kPa)が変化する。
FIG. 2 is a diagram showing the relationship between the water flow resistance of the cooling system and the flow rate.
Referring to FIG. 2, the water flow resistance (kPa) of the cooling system is shown on the vertical axis, and the flow rate (L / min) of the refrigerant such as cooling water is shown on the horizontal axis. If the flow resistance of the cooling system and the flow rate are in a normal relationship, the flow resistance (kPa) changes along a curve passing through the points P4 and P5 when the flow rate increases or decreases. However, if clogging due to foreign matter (rust or the like) occurs in the water passage of the cooling system, the water passage resistance increases. In this case, when the flow rate increases or decreases, the water flow resistance (kPa) changes along a curve passing through the points P1, P2, and P3.
[規則91に基づく訂正 21.03.2012]
なお、図2中にはウォータポンプの回転速度と流量と通水抵抗との関係も示されている。回転速度N=N0の時に比べて、回転速度が高い回転速度N=N1の方が通水抵抗が増加し、さらに回転速度が高い回転速度N=N3の方が通水抵抗がさらに増加することが示されている。
[Correction 21.03.2012 under Rule 91]
FIG. 2 also shows the relationship among the rotational speed, flow rate, and water flow resistance of the water pump. Compared to the case where the rotational speed N = N0, the water passage resistance increases at the rotational speed N = N1 where the rotational speed is high, and the water passage resistance further increases at the rotational speed N = N3 where the rotational speed is higher. It is shown.
ここで、通水路に異物が挟まり、通水抵抗が増加している故障が発生中であるとする。ウォータポンプ104の回転速度N=N1であれば正常な動作点が図2中の点P5であるとすると、故障時の動作点は点P1である。回転速度と流量との間には一定の関係があるので、制御装置30は、流量が通常よりも低下したことを検出すると、故障箇所の特定を行なうために、動作点P1でウォータポンプの回転速度NをN0に低下させる。このときに、それに応じて流量が矢印A1に示すように低下するようであれば、異物による通水抵抗の増加が考えられる。
Here, it is assumed that there is a failure in which water passage resistance is increasing due to foreign matter caught in the water passage. If the rotational speed N of the
そこで、図1の制御装置30がウォータポンプ104に対して制御信号SPを変化させ、回転速度をN3に増加させる。異物が挟まったままであれば、矢印A2に示すように動作点は点P3に移動する。ここで、通水抵抗が増加したことによって異物が除去された場合、流量が回復し矢印A3に示すように動作点が点P4に移動する。流量が回復したことを流量センサによって検出できたら、制御装置はウォータポンプ104に対して制御信号SPを変化させ、回転速度をN1に戻す。
Therefore, the
このようにして異常であった動作点P1を正常である動作点P5に復帰させることができる場合もある。 In this way, there is a case where the operating point P1 which is abnormal can be returned to the normal operating point P5.
他の故障が発生している場合についても原因箇所を特定することができる。
図3は、水温とポンプの回転速度と流量とにもとづいて考えられる異常とその検証方法を示した図である。
The cause can be identified even when another failure has occurred.
FIG. 3 is a diagram showing a possible abnormality based on the water temperature, the rotational speed of the pump, and the flow rate, and a verification method thereof.
図3を参照して、従来は、水温とポンプの回転速度に基づいて冷却系の異常が発見されていた。本実施の形態ではこれらに流量を入力パラメータとして加えることにより、さらに細分化した異常個所の特定を可能とする。 Referring to FIG. 3, conventionally, an abnormality of the cooling system has been discovered based on the water temperature and the rotational speed of the pump. In the present embodiment, by adding the flow rate as an input parameter to these, it is possible to specify a further subdivided abnormal part.
まず、図3の第1行目に示されるように、水温、回転速度、流量がともに正常である場合には、考えられる故障は無い。ここで、正常か異常かの境界は、実験などで適宜定めるものとする。この境界に対応するしきい値と各入力パラメータとを比較して正常か異常かが判定される。 First, as shown in the first line of FIG. 3, there are no possible failures when the water temperature, rotation speed, and flow rate are all normal. Here, the boundary between normal and abnormal is appropriately determined by experiments or the like. A threshold value corresponding to this boundary is compared with each input parameter to determine whether it is normal or abnormal.
次に、図3の第2行目に示されるように、水温および回転速度は正常であるが、流量が異常(低下)である場合については、考えられる異常は通水抵抗の悪化である。この場合には、制御装置30は、ウォータポンプ104の回転を一時的に変化させ、流量変化を観測する。そして、図2の動作点P1から流量の変化を観測して点P2からP3のラインに沿って動作点が移動するようであれば、制御装置30は通水抵抗が悪化していると判断する。この場合には、制御装置30は、ウォータポンプ104の回転を高くして動作点を点P3側に移動させ、異物が通水路に挟まって動かなくなっている状態を改善するように試みる。異物が移動し流量が元の状態に復帰すれば、制御装置30は回転速度を元に戻す。流量が元の状態に復帰しなければ、制御装置30は配管系の異常であるという診断(ダイアグ)を確定させる。
Next, as shown in the second line of FIG. 3, when the water temperature and the rotation speed are normal, but the flow rate is abnormal (decreased), the possible abnormality is deterioration of water flow resistance. In this case, the
図3の第3行目に示されるように、水温が正常で回転速度が低回転異常であり流量も異常(低下)である場合には、ウォータポンプ104の異常かまたはウォータポンプ104の制御の異常と考えられる。この場合には、制御装置30は、ウォータポンプ104の電流やウォータポンプ104の温度を観測して、異常発熱や過電流等の異常が認められればポンプ自体の異常と判断する。電流や温度に異常が無い場合には、制御装置30は他の冷却系の異常であると判断する。
As shown in the third row of FIG. 3, when the water temperature is normal, the rotation speed is low and the flow rate is abnormal (decreased), the
[規則91に基づく訂正 21.03.2012]
また、図3の第4行目に示されるように、水温が高温異常であるが、回転速度および流量が正常である場合には、冷却されるインバータやコンバータの発熱が大きいか、ラジエータからの放熱異常であるか、水温センサの異常であると考えられる。この場合に、制御装置30は、ラジエータファンを作動させファンが回転するか否かを確認したり、インバータやコンバータの異常がすでに検出されていないかを確認したりする。図3では、制御装置30が複数のECUを含んでいる場合を示し、この場合には、制御装置30は、ECU間通信によって、ラジエータファンを制御するECUに冷却系の異常判定を行なうECUがファンの回転速度を変える指令を行なったり、インバータやコンバータを直接制御するモータECUから冷却系の異常判定を行なうECUがインバータ異常の情報を得たりする。
[Correction 21.03.2012 under Rule 91]
In addition, as shown in the fourth line of FIG. 3, when the water temperature is abnormally high, but the rotation speed and flow rate are normal, the inverter or converter to be cooled generates a large amount of heat, or from the radiator. It is considered that the heat radiation is abnormal or the water temperature sensor is abnormal. In this case, the
図4は、図1の制御装置30で実行される診断処理を説明するためのフローチャートである。このフローチャートの処理は、一定時間ごとまたは所定の条件が成立するごとにメインルーチンから呼び出されて実行される。
FIG. 4 is a flowchart for explaining the diagnosis process executed by the
図1、図4を参照して、まず処理が開始されると、ステップS1において制御装置30は、温度センサ108から水温TWを読込み、回転センサ105からウォータポンプ104の回転速度Npを読込み、流量センサ114から流量FRを読込む。
Referring to FIGS. 1 and 4, when the process is first started, in step S <b> 1,
ステップS2では、制御装置30は、水温TWが正常、かつ回転速度Npが正常、かつ流量FRが少ない、という条件が成立するか否かを判断する。正常とは、たとえば所定の上限値と下限値との間に数値が入っていることを示す。また、少ないとは、正常である所定範囲の下限値より数値が小さいことを示す。
In step S2, the
ステップS2の条件が成立した場合にはステップS2からステップS3に処理が進む。ステップS3では、制御装置30は一時的にウォータポンプ104の回転速度Npを低下させるように制御信号SPを変化させる。
If the condition of step S2 is satisfied, the process proceeds from step S2 to step S3. In step S3, the
そして、ステップS4において、回転速度を低下させても対応するように流量センサ114から取得される流量FRが低下しない場合にはステップS14に処理が進む。一方、ステップS4において、回転速度の低下に対応するように流量センサ114から取得される流量FRが低下した場合にはステップS5に処理が進む。
In step S4, if the flow rate FR acquired from the
ステップS5に処理が進んだ場合、図2の動作点が点P1から点P2に移動したと考えられる。このときは、故障は、配管系異常(たとえば配管に異物が詰まって断面積が減少した)であると推定される。配管系異常という診断を確定させるまえに、ステップS5において一時的にウォータポンプ104の回転速度Npを増加させ流量を増やして、配管系異常(たとえば異物が詰まったこと)を元の状態に復帰させることを試みる。
When the process proceeds to step S5, it is considered that the operating point in FIG. 2 has moved from point P1 to point P2. At this time, the failure is estimated to be a piping system abnormality (for example, the piping is clogged with foreign matter and the cross-sectional area is reduced). Before the diagnosis of the piping system abnormality is confirmed, in step S5, the rotational speed Np of the
ステップS6において制御装置30は流量FRが正常な状態に回復したか否かを判断する。これは図2において動作点が点P3(異常)であるか点P4(正常)であるかを見ればよい。ウォータポンプ104の回転速度Npと流量FRとは正常時には点P4-P5を通る曲線に示す関係があるので、回転速度Npに対して流量FRの正常範囲を定めておくことは容易である。
In step S6, the
ステップS6において、流量が正常時の流量に回復している場合には、配管系異常は正常になったと考えられるので、ステップS2において“NO”であった場合と合流し、処理はステップS8に進む。一方、ステップS6において流量が回復しなかった場合には、ステップS7に処理が進み、配管系異常の診断が確定される。この診断結果は、その場で運転者に報知されたり、不揮発性メモリなどに記憶され、後に修理工場で読み出されて分析されたりする。 In step S6, when the flow rate is restored to the normal flow rate, it is considered that the piping system abnormality has become normal. Therefore, the process merges with the case of “NO” in step S2, and the process proceeds to step S8. move on. On the other hand, if the flow rate does not recover in step S6, the process proceeds to step S7, and the diagnosis of the piping system abnormality is confirmed. The diagnosis result is notified to the driver on the spot, stored in a nonvolatile memory or the like, and later read out at a repair shop for analysis.
ステップS8では、制御装置30は、水温TWが正常、かつ回転速度Npが低い、かつ流量FRが少ない、という条件が成立するか否かを判断する。正常とは、たとえば所定の上限値と下限値との間に数値が入っていることを示す。また、低い、少ないとは、正常である所定範囲の下限値より数値が小さいことを示す。
In step S8, the
[規則91に基づく訂正 21.03.2012]
ステップS8の条件が成立した場合にはステップS8からステップS9に処理が進み、条件が成立しなかった場合にはステップS11に処理が進む。
[Correction 21.03.2012 under Rule 91]
If the condition of step S8 is satisfied, the process proceeds from step S8 to step S9. If the condition is not satisfied, the process proceeds to step S11.
ステップS9では、ウォータポンプ104の電流値異常またはウォータポンプ104の内部温度異常が発生しているか否かが判断される。ウォータポンプ104の電流値異常はウォータポンプ104の電源ラインに電流センサを設けておけば検出することができる。またウォータポンプ104の内部温度は、ウォータポンプ104の内部または近傍に温度センサを取り付けておけば検出することができる。
In step S9, it is determined whether or not the current value abnormality of the
ステップS9においてウォータポンプ104の電流値異常およびウォータポンプ104の内部温度異常のいずれもが発生していなかった場合には、ステップS14に処理が進む。ステップS9でウォータポンプ104の電流値異常またはウォータポンプ104の内部温度異常が発生していた場合には、ステップS10に処理が進み、ウォータポンプ104の性能異常の診断が確定される。この診断結果は、その場で運転者に報知されたり、不揮発性メモリなどに記憶され、後に修理工場で読み出されて分析されたりする。
If neither the current value abnormality of the
ステップS11では、制御装置30は、水温TWが異常(高い)、かつ回転速度Npが正常、かつ流量FRが正常、という条件が成立するか否かを判断する。正常とは、たとえば所定の上限値と下限値との間に数値が入っていることを示す。また、高いとは、正常である所定範囲の上限値より数値が大きいことを示す。
In step S11, the
ステップS11の条件が成立した場合にはステップS11からステップS12に処理が進み、条件が成立しなかった場合にはステップS15に処理が進む。ステップS15では、いずれの条件にも該当しなかったため、故障とは診断されず、制御はメインルーチンに戻される。 If the condition of step S11 is satisfied, the process proceeds from step S11 to step S12. If the condition is not satisfied, the process proceeds to step S15. In step S15, since none of the conditions are met, a failure is not diagnosed and control is returned to the main routine.
ステップS12では、ラジエータファン103の作動異常またはインバータ14の発熱異常が発生しているか否かが判断される。ラジエータファン103の作動異常は制御装置30からの指令値とラジエータファン103で検出された回転速度とを比較することにより判断することができる。インバータ14の発熱異常は、インバータ14に組み込まれている温度センサ112からの温度TIが所定のしきい値を超えたか否かで判断することができる。
In step S12, it is determined whether an operation abnormality of the
ステップS12においてラジエータファン103の作動異常およびインバータ14の発熱異常のいずれもが発生していなかった場合には、ステップS14に処理が進む。ステップS12でラジエータファン103の作動異常およびインバータ14の発熱異常のいずれかが発生していた場合には、ステップS13に処理が進み、放熱異常または発熱異常の診断が確定される。この診断結果は、その場で運転者に報知されたり、不揮発性メモリなどに記憶され、後に修理工場で読み出されて分析されたりする。
In step S12, when neither the
またステップS14に処理が進んだ場合には、冷却系の他の異常(冷却系の異常のうちステップS7,S10,S13以外の異常)という診断が確定し、その場で運転者に報知されたり、不揮発性メモリなどに記憶され、後に修理工場で読み出されて分析されたりする。 When the process proceeds to step S14, a diagnosis of another abnormality of the cooling system (abnormalities other than those of steps S7, S10, and S13 among abnormality of the cooling system) is confirmed and notified to the driver on the spot. It is stored in a non-volatile memory or the like and later read out at a repair shop for analysis.
以上説明したように、本実施の形態によれば、ポンプ回転速度や冷却水温度などの既存のパラメータに冷却水流量という新たなパラメータを組み合わせることにより、冷却システムの不具合部位を細分化して特定することができる。 As described above, according to the present embodiment, the defective part of the cooling system is subdivided and specified by combining a new parameter such as the cooling water flow rate with the existing parameters such as the pump rotation speed and the cooling water temperature. be able to.
今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなく、請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
2 車輪、10,13 電圧センサ、12 電圧コンバータ、14 インバータ、15 U相アーム、16 V相アーム、17 W相アーム、24 電流センサ、30 制御装置、100 車両、102 ラジエータ、103 ラジエータファン、104 ウォータポンプ、105 回転センサ、106 リザーバータンク、108,110,112 温度センサ、114 流量センサ、C1,CH 平滑用コンデンサ、D1~D8 ダイオード、L1 リアクトル、MB バッテリ、MG モータジェネレータ、PL1,PL2 正極母線、Q1~Q8 IGBT素子、SL1,SL2 負極母線、SMRB,SMRG システムメインリレー。 2 wheel, 10, 13 voltage sensor, 12 voltage converter, 14 inverter, 15 U phase arm, 16 V phase arm, 17 W phase arm, 24 current sensor, 30 control device, 100 vehicle, 102 radiator, 103 radiator fan, 104 Water pump, 105 rotation sensor, 106 reservoir tank, 108, 110, 112 temperature sensor, 114 flow sensor, C1, CH smoothing capacitor, D1 to D8 diode, L1 reactor, MB battery, MG motor generator, PL1, PL2 positive bus Q1-Q8 IGBT elements, SL1, SL2 negative bus, SMRB, SMRG system main relay.
Claims (4)
車両の駆動装置を冷却する液媒体を循環させる流路(116)と、
前記流路を流れる前記液媒体の流量を検出する流量検出部(114)と、
前記液媒体の温度を検出する温度センサ(108)と、
前記流路上に設けられた前記液媒体を循環させるためのポンプ(104)と、
前記ポンプの回転速度を検出する回転速度センサ(105)と、
前記ポンプの駆動を制御する制御装置(30)とを備え、
前記制御装置は、前記液媒体の流量と、前記液媒体の温度と、前記ポンプの回転速度とに応じて、冷却システムの不具合部位を特定する、車両の冷却システム。 A vehicle cooling system,
A flow path (116) for circulating a liquid medium for cooling a vehicle drive device;
A flow rate detector (114) for detecting a flow rate of the liquid medium flowing through the flow path;
A temperature sensor (108) for detecting the temperature of the liquid medium;
A pump (104) for circulating the liquid medium provided on the flow path;
A rotational speed sensor (105) for detecting the rotational speed of the pump;
A control device (30) for controlling the driving of the pump,
The said control apparatus is a vehicle cooling system which pinpoints the malfunctioning part of a cooling system according to the flow volume of the said liquid medium, the temperature of the said liquid medium, and the rotational speed of the said pump.
前記ラジエータに送風するためのファン(103)とをさらに備え、
前記制御装置は、前記液媒体の温度が異常であり、前記ポンプの回転速度および前記液媒体の流量が正常である場合には、前記ファンの作動状態とインバータ温度に基づいて発熱または放熱異常を検出する、請求項1に記載の車両の冷却システム。 A radiator (102) provided on the flow path;
A fan (103) for blowing air to the radiator;
When the temperature of the liquid medium is abnormal and the rotation speed of the pump and the flow rate of the liquid medium are normal, the control device generates an abnormality in heat generation or heat dissipation based on the operating state of the fan and the inverter temperature. The vehicle cooling system according to claim 1, wherein the vehicle cooling system is detected.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/055070 WO2012120592A1 (en) | 2011-03-04 | 2011-03-04 | Cooling system for vehicle |
| DE112011105006.2T DE112011105006B4 (en) | 2011-03-04 | 2011-03-04 | Vehicle cooling system |
| JP2012538903A JP5338989B2 (en) | 2011-03-04 | 2011-03-04 | Vehicle cooling system |
| US13/581,670 US8649931B2 (en) | 2011-03-04 | 2011-03-04 | Cooling system for vehicle |
| CN201180024638.3A CN102892991B (en) | 2011-03-04 | 2011-03-04 | Cooling system for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/055070 WO2012120592A1 (en) | 2011-03-04 | 2011-03-04 | Cooling system for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012120592A1 true WO2012120592A1 (en) | 2012-09-13 |
Family
ID=46797604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2011/055070 Ceased WO2012120592A1 (en) | 2011-03-04 | 2011-03-04 | Cooling system for vehicle |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8649931B2 (en) |
| JP (1) | JP5338989B2 (en) |
| CN (1) | CN102892991B (en) |
| DE (1) | DE112011105006B4 (en) |
| WO (1) | WO2012120592A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014058021A1 (en) * | 2012-10-12 | 2014-04-17 | 日野自動車 株式会社 | Cooling system for vehicle-mounted power control device and method for diagnosing abnormality in cooling system |
| JP2015209055A (en) * | 2014-04-25 | 2015-11-24 | 三菱自動車工業株式会社 | Cooling mechanism failure detection device |
| JP2019029140A (en) * | 2017-07-27 | 2019-02-21 | トヨタ自動車株式会社 | Battery cooling system |
| RU2681436C1 (en) * | 2017-07-27 | 2019-03-06 | Тойота Дзидося Кабусики Кайся | Battery cooling system |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110246007A1 (en) * | 2010-03-30 | 2011-10-06 | Hyundai Motor Company | Apparatus for controlling electric water pump of hybrid vehicle and method thereof |
| US9389215B2 (en) | 2011-09-23 | 2016-07-12 | Mastinc | Multi-modal fluid condition sensor platform and system thereof |
| US9020766B2 (en) | 2011-09-23 | 2015-04-28 | Mastinc. | Multi-modal fluid condition sensor platform and system therefor |
| US9151695B2 (en) * | 2012-06-19 | 2015-10-06 | General Electric Company | Systems and methods for diagnosing an engine |
| US10006337B2 (en) * | 2012-06-19 | 2018-06-26 | General Electric Company | Systems and methods for diagnosing an engine |
| US9568461B2 (en) | 2012-12-31 | 2017-02-14 | Mastinc | Multi-modal fluid condition sensor platform and system therefor |
| US20140266065A1 (en) * | 2013-03-15 | 2014-09-18 | Mastinc | Multi-modal fluid condition sensor platform and system thereof |
| JP2014187789A (en) * | 2013-03-22 | 2014-10-02 | Fanuc Ltd | Motor drive device having abnormality detection function |
| US10590829B2 (en) * | 2014-03-06 | 2020-03-17 | Hitachi Automotive Systems, Ltd. | Control device for internal combustion engine and control method for cooling device |
| JP6079759B2 (en) * | 2014-12-01 | 2017-02-15 | トヨタ自動車株式会社 | Apparatus and method for determining clogging of engine cooling system |
| JP6269559B2 (en) * | 2015-04-10 | 2018-01-31 | トヨタ自動車株式会社 | In-vehicle secondary battery cooling system |
| JP6168092B2 (en) * | 2015-04-10 | 2017-07-26 | トヨタ自動車株式会社 | In-vehicle secondary battery cooling system |
| JP6172201B2 (en) * | 2015-04-10 | 2017-08-02 | トヨタ自動車株式会社 | In-vehicle secondary battery cooling system |
| US10545002B2 (en) | 2016-04-10 | 2020-01-28 | Forum Us, Inc. | Method for monitoring a heat exchanger unit |
| US10533881B2 (en) | 2016-04-10 | 2020-01-14 | Forum Us, Inc. | Airflow sensor assembly for monitored heat exchanger system |
| US10514205B2 (en) | 2016-04-10 | 2019-12-24 | Forum Us, Inc. | Heat exchanger unit |
| US10502597B2 (en) | 2016-04-10 | 2019-12-10 | Forum Us, Inc. | Monitored heat exchanger system |
| US10480820B2 (en) | 2016-04-10 | 2019-11-19 | Forum Us, Inc. | Heat exchanger unit |
| CN109425490A (en) * | 2017-08-31 | 2019-03-05 | 深圳市万斯得自动化设备有限公司 | New-energy automobile simulated testing system |
| JP6992479B2 (en) * | 2017-12-15 | 2022-01-13 | トヨタ自動車株式会社 | Abnormality diagnosis device for cooling device |
| US10757843B2 (en) * | 2018-01-12 | 2020-08-25 | Ford Global Technologies, Llc | Vehicular traction inverter temperature control system |
| US11098962B2 (en) | 2019-02-22 | 2021-08-24 | Forum Us, Inc. | Finless heat exchanger apparatus and methods |
| US11946667B2 (en) | 2019-06-18 | 2024-04-02 | Forum Us, Inc. | Noise suppresion vertical curtain apparatus for heat exchanger units |
| CN112857842A (en) * | 2019-11-11 | 2021-05-28 | 株洲中车时代电气股份有限公司 | Fault early warning method and device for cooling system |
| CN111570128B (en) * | 2020-05-09 | 2021-08-17 | 广州极飞科技股份有限公司 | Spray control method, device, system, vehicle and storage medium |
| CN113107660B (en) * | 2021-03-31 | 2022-08-19 | 潍柴重机股份有限公司 | Control method of intercooler cooling system |
| KR20230055243A (en) * | 2021-10-18 | 2023-04-25 | 현대자동차주식회사 | Cooling system of vehicle and method for diagnosing an abnormal state thereof |
| CN113982733A (en) * | 2021-12-08 | 2022-01-28 | 济南吉美乐电源技术有限公司 | Accurate management system of heat load of full liquid cooling generating set |
| FR3136706B1 (en) * | 2022-06-16 | 2024-09-20 | Psa Automobiles Sa | MONITORING THE OPERATION OF A HEAT EXCHANGE CIRCUIT ASSOCIATED WITH THE INVERTER OF AN ELECTRIC DRIVE MACHINE OF A VEHICLE |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005180225A (en) * | 2003-12-17 | 2005-07-07 | Hitachi Constr Mach Co Ltd | Engine cooling water system fault diagnosis device for construction machinery |
| JP2009046077A (en) * | 2007-08-22 | 2009-03-05 | Toyota Motor Corp | Electric water pump abnormality determination device |
| JP2009221874A (en) * | 2008-03-13 | 2009-10-01 | Toyota Motor Corp | Water pump |
| JP2009244184A (en) * | 2008-03-31 | 2009-10-22 | Mitsubishi Motors Corp | Failure determination device |
| JP2010124628A (en) * | 2008-11-20 | 2010-06-03 | Toyota Motor Corp | Vehicle mounted with motor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4045894B2 (en) * | 2002-08-19 | 2008-02-13 | 株式会社デンソー | Engine and fuel cell cooling system |
| JP4384066B2 (en) * | 2005-02-18 | 2009-12-16 | 日産自動車株式会社 | Vehicle cooling system |
| CN1884804A (en) * | 2005-06-22 | 2006-12-27 | 比亚迪股份有限公司 | Water cooling system of engine and cooling method thereof |
| US7296543B2 (en) * | 2006-04-06 | 2007-11-20 | Gm Global Technology Operations, Inc. | Engine coolant pump drive system and apparatus for a vehicle |
| JP4372799B2 (en) * | 2007-02-19 | 2009-11-25 | トヨタ自動車株式会社 | Internal combustion engine control system |
| US7932833B2 (en) * | 2007-11-30 | 2011-04-26 | Caterpillar Inc. | Detecting coolant flow reduction for a marine engine system |
| CN103775189A (en) * | 2008-07-16 | 2014-05-07 | 博格华纳公司 | A method of diagnosing a cooling subsystem of an engine system in response to dynamic hydraulic pressure sensed in the cooling subsystem |
| US7748262B2 (en) * | 2008-10-09 | 2010-07-06 | Toyota Motor Engineering & Manufacturing North America, Inc. | Coolant flow measurement devices and methods of measuring coolant flow |
-
2011
- 2011-03-04 US US13/581,670 patent/US8649931B2/en active Active
- 2011-03-04 JP JP2012538903A patent/JP5338989B2/en active Active
- 2011-03-04 DE DE112011105006.2T patent/DE112011105006B4/en active Active
- 2011-03-04 CN CN201180024638.3A patent/CN102892991B/en active Active
- 2011-03-04 WO PCT/JP2011/055070 patent/WO2012120592A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005180225A (en) * | 2003-12-17 | 2005-07-07 | Hitachi Constr Mach Co Ltd | Engine cooling water system fault diagnosis device for construction machinery |
| JP2009046077A (en) * | 2007-08-22 | 2009-03-05 | Toyota Motor Corp | Electric water pump abnormality determination device |
| JP2009221874A (en) * | 2008-03-13 | 2009-10-01 | Toyota Motor Corp | Water pump |
| JP2009244184A (en) * | 2008-03-31 | 2009-10-22 | Mitsubishi Motors Corp | Failure determination device |
| JP2010124628A (en) * | 2008-11-20 | 2010-06-03 | Toyota Motor Corp | Vehicle mounted with motor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014058021A1 (en) * | 2012-10-12 | 2014-04-17 | 日野自動車 株式会社 | Cooling system for vehicle-mounted power control device and method for diagnosing abnormality in cooling system |
| JP2014076781A (en) * | 2012-10-12 | 2014-05-01 | Hino Motors Ltd | On-vehicle power control device cooling system and abnormality diagnosis method thereof |
| CN104703838A (en) * | 2012-10-12 | 2015-06-10 | 日野自动车株式会社 | Cooling system for vehicle-mounted power control device and method for diagnosing abnormality in cooling system |
| US10393125B2 (en) | 2012-10-12 | 2019-08-27 | Hino Motors, Ltd. | Cooling system for vehicle-mounted power control device and method for diagnosing abnormality in cooling system |
| JP2015209055A (en) * | 2014-04-25 | 2015-11-24 | 三菱自動車工業株式会社 | Cooling mechanism failure detection device |
| JP2019029140A (en) * | 2017-07-27 | 2019-02-21 | トヨタ自動車株式会社 | Battery cooling system |
| RU2681436C1 (en) * | 2017-07-27 | 2019-03-06 | Тойота Дзидося Кабусики Кайся | Battery cooling system |
| US11289747B2 (en) | 2017-07-27 | 2022-03-29 | Toyota Jidosha Kabushiki Kaisha | Battery cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102892991A (en) | 2013-01-23 |
| CN102892991B (en) | 2014-12-10 |
| JPWO2012120592A1 (en) | 2014-07-07 |
| US20130030643A1 (en) | 2013-01-31 |
| US8649931B2 (en) | 2014-02-11 |
| JP5338989B2 (en) | 2013-11-13 |
| DE112011105006T5 (en) | 2013-11-28 |
| DE112011105006B4 (en) | 2014-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5338989B2 (en) | Vehicle cooling system | |
| JP5626459B2 (en) | Cooling system and vehicle equipped with the same | |
| JP4349447B2 (en) | Inverter control device and vehicle | |
| JP4438833B2 (en) | Abnormality detection apparatus and abnormality detection method for power converter | |
| JP5598600B2 (en) | VEHICLE DIAGNOSIS DEVICE AND VEHICLE DIAGNOSIS METHOD | |
| WO2008111593A1 (en) | Input/output control device for secondary battery, and vehicle | |
| JP6237699B2 (en) | Anomaly detection device | |
| WO2012164745A1 (en) | Cooling system and vehicle comprising same | |
| CN105682975B (en) | Vehicle control system and control method | |
| JP2009254206A (en) | Power source control system | |
| JP2010220384A (en) | Device for control of rotary electric machine | |
| JP2013110896A (en) | Electric vehicle | |
| JP5862504B2 (en) | Vehicle control apparatus and vehicle | |
| JP7059634B2 (en) | Power system | |
| JP2010259210A (en) | Rotating electrical machine control device | |
| JP2011087406A (en) | Electric vehicle | |
| JP2020088872A (en) | Power converter for electric vehicle | |
| JP2012205448A (en) | Vehicle diagnosis system | |
| JP5971183B2 (en) | Booster control device | |
| JP2025152691A (en) | Electric power conversion system and drive system | |
| JP2025152694A (en) | Electric power conversion system and drive system | |
| WO2022254508A1 (en) | Power conversion device | |
| JP2013038845A (en) | Vehicle drive device | |
| JP2012023829A (en) | Device and method for determining abnormality of current sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 201180024638.3 Country of ref document: CN |
|
| ENP | Entry into the national phase |
Ref document number: 2012538903 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 13581670 Country of ref document: US |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11860365 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 1120111050062 Country of ref document: DE Ref document number: 112011105006 Country of ref document: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 11860365 Country of ref document: EP Kind code of ref document: A1 |